Material: Stainless Steel Size: 45mm/1.77 inches Color: As shown in the picture 1. Enhance exhaust performance: Oxygen O2 sensor extender/O2 oxygen sensor gasket 45mm can extend the length of the oxygen sensor, making it easier to receive more accurate exhaust data and achieve better exhaust performance. 2. Enhance engine performance: By extending the length of the oxygen sensor, the oxygen O2 sensor extender/O2 oxygen sensor gasket 45mm can help the engine get more oxygen, thereby enhancing engine performance. 3. Reduce noise and vibration: Installing the oxygen sensor with the oxygen O2 sensor extender/O2 oxygen sensor gasket 45mm can reduce engine noise and vibration, making driving smoother and more comfortable. 4. Save fuel costs: The oxygen O2 sensor extender/O2 oxygen sensor gasket 45mm can help the engine run more efficiently, thereby saving fuel costs and reducing vehicle operating costs. 5. Easy installation and wide application: Oxygen O2 sensor extender/O2 oxygen sensor gasket 45mm is easy to install and has a wide range of applications, suitable for most car models and engines. Package includes: The quantity you purchased.